Improvement in sewing-machines



I 2 SheetsSheet 1, W. M. FULLER. SEWING MACHINE.

No. 32,496. Patented June 4, 18611.

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SEWING MACHINE.

No. 32,496. Patented June 4, 1861 U fzwenioir MW Wm w M y lvvwl 7775 7765566. WW 'H no: roams nnzns co. wmmlmu. wasnmofon. 0.4:.

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UNITED STATES PATENT OFFICE.

WILLARD M. FULLER, OF CHICAGO, ILLINOIS, ASSIGNOR T0 HIMSELF AND GEO. W. CHANDLER, OF SAME PLACE.

IMPROVEMEN'FIN SEWING-MACHINES.

Specification forming part of Letters Patent No.. 321496, dated J une 4, 1861.

- To all whom it may concern:

clear, and exact description of the construction and operation thereof, reference being had to the annexed drawings, making a part of this specification, and to-thedetters of reference marked thereon.

Figure l is a side elevation of my said im proved sewing-machine. Fig. 2 is an inverted plan or bottom view of the same, showing the arrangement'of the partsb low the plate. Fig. Fig. 4 is a section of the head of the machine containing the parts immediately connected with the needle.

A B is the plate of the machine, standing on four legs. 0 is a hollow vert cal pillar, supporting the hollow horizontal arm D. E is the head of the machine, screwed to the horizon tal arm D, and represented 'in section by Fig. 4. The needle a is held' by a set-screw in the slide 5, which has a horizontal motion in the needlebar F. The needle-slide b is held in its place by the forks 0 of the needle-bar F. When the needle-bar is raised the slide b. with its'needle, is first shifted to the leftby the radial action of the dog or pawl d, and is subsequently shifted to the right, on being further raised, by coming in'contact with the inclined plane 0. The thumb-screw a: serves to adjust the inclined plane in the vertical slot of the head. The pressure of the springfin the needle-bar upon the washer g and the slide b keeps the slide and needle steady. The needle-bar F and its slide and needle receive their vertical motion from the pin h on the crank-plate attached to the shaft 2' t, contained in the hollow arm D of the frame. The shaft it is worked by a pulley or handle, it, and it has a cam, l, bywliich it also imparts motion to the inclosed levermm, vibrating on the pin a in the vertical pillar. The slotted lobper 0 is curved in conformity with its. distance from the needle a, and has a groove in its outer side and a slot in its end for the reception of the lower thread. The. looper is secured by a set-screw .in the end of a lever vibrating on the center 12, and receiving its motion from the vibrating lever in m, through the connecting-rod g, which is held in position by the slide 1'.

When it is desired to operate my machine thethread from the spool s is passed through the leader t and through the eye of the needle (1, and the thread from the lower spool, u, is first passed through the end of the tensionspring a and then over the guide-bookie to the slot of the looper a. When the needle has carried its thread through the cloth being sewed the looper passes through the loop of the upper thread and holds it'until the ne-edlc'returns and passes through the loop of the lower thread. The alternate operations of the needle and looper thus form the stitches. As the needle passesup the pawl d shifts the needle slide it by its radial movement, and thus feeds the cloth by the needle for another stitch, and as the needle-bar ascends still farther the slide is brought into contact with the inclined plane 0 and is shifted back to its normal position in the needle-bar, in which it descends until the needle has passed through the cloth and the point of the pawl has again caught in the notch of the needle-slide made"f0r its reception. The position in which the inclined e is secured by the screw w determines the length of the'stitch.

1 claim as my invention and desire to secure by Letters Batentl. The needle-slide b, the pawl d, and. the inclined planee, substantially as described, arranged for feeding the cloth for the stitches.

2. The slotted looper 0 and its .gnide-hook to, combined for the purpose specified.

3. A needle with a horizontal shifting motion, as described, combined with a. slotted looper, as described, for the purpose of making a series of stitches.

WILLARD M. FULLER. 

